﻿using System;

namespace Paas.Pioneer.Domain.Shared.Extensions
{
	public static class DateTimeExtensions
	{
		/// <summary>
		/// 时间戳起始日期
		/// </summary>
		public static DateTime TimestampStart = new DateTime(1970, 1, 1, 0, 0, 0, 0);

		/// <summary>
		/// 转换为时间戳
		/// </summary>
		/// <param name="dateTime"></param>
		/// <param name="milliseconds">是否使用毫秒</param>
		/// <returns></returns>
		public static long ToTimestamp(this DateTime dateTime, bool milliseconds = false)
		{
			var timestamp = dateTime.ToUniversalTime() - TimestampStart;
			return (long)(milliseconds ? timestamp.TotalMilliseconds : timestamp.TotalSeconds);
		}

		/// <summary>
		/// 获取周几
		/// </summary>
		/// <param name="datetime"></param>
		/// <returns></returns>
		public static string GetWeekName(this DateTime datetime)
		{
			var day = (int)datetime.DayOfWeek;
			var week = new string[] { "周日", "周一", "周二", "周三", "周四", "周五", "周六" };
			return week[day];
		}
	}
}